The Roller Chain manufacturer will teach you how to install the double-speed chain correctly:
Before installation, you can look around
During installation, you can only or along the ray starting from the foot.
What should be paid attention to when installing the double speed chain?
First, keep the two shafts in balance and the two wheels on the same plane. Secondly, check whether the sprocket and shaft are connected reliably, and the chain is not allowed to be over-tensioned. Third, keep a certain gap between the chain and the chain cover, and do not use the new chain with the sprocket with severe wear. The chain ring is connected reliably, the open end of the snap ring is opposite to the direction of rotation.
information about Roller Chain : https://www.hzqjchain.com/product/roller-chains/